Hoisting apparatus



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No.46L142Q me om wenns ce. moro-umu., msm

apparatus of the class wherein the coal con! UNITED STATES PATENT OEEicE.

LUCIUS E. PINKHAM, OF NEIVTON, MASSACHUSETTS.

HOISTING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 461,142, dated October 13, 1891. Application filed ovember 11, 1890. Serial No. 371,011. (No model.)

To aZZ whom. it may concern'.-

Be it known that I, LUCIUsE. PINKHAM, a citizen of the United States, residing in Newton, in the county of Middlesex and Commonwealth of Massachusetts, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a full specification.

My invention consists of certain improved features of construction in apparatus for hoisting coal and like material, especially in tained in bulk in thehold of a vessel or otherwise is automatically shoveled into a bucket, which bucket is raised vertically for some distance, is then carried inward while being raised toa point directly over the point of delivery, and finally dumped into a suitable chute or other receptacle.

The object of my invention is to provide ready means for controlling the movement of the bucket or shovel containing the load inward as well as upward, the construction and arrangement being as hereinafter-fully described in detail.

In the accompanying drawings, Figure 1 is.

a side elevation of an apparatus embodying the features of my invention, certain of -the parts being broken away to more completely illustrate its mode of operation. Fig. 2 is a similar view of the upper portion of the apparatus, showinghow the speed of the shovel inward may`be varied. Fig. 3 is a view of one of the drums on an enlarged scale. Fig. a shows in section the sliding frame and ad jacent parts for drawing the shovel inward while being raised. Fig. 5 is a front view of the sliding frame; and Fig. 6 is a transverse section in the plane of x .50, Fig. 4, through the sliding frame.

A is the upright f rame-work supporting the working parts of the apparatus.

A is a platform, some distance up, on `which is placed the engine M and other controlling mechanism, this being preferably contained in the house or shed R, built on said platform and in which the operator is stationed.

D is a trolley, movable horizontally in and out over the boom C, which is supported by the frame-work. This trolley is of any suitable construction and is guided to move on any desired kind of track, the wheels or rollers F F moving on said track. The boom C necessary that the trolley be guided to` move :in and out readily.

The trolley has journaled therein the sheave-pulley E, over which moves the wire rope or chain L, to the end of which is attached the loading and dumping bucket or shovelSS. This ropeL passes over the sheavepulley I, journaled in suitable bearings near the top of the frame-work A, the rope L', which is secured to the'rope Lby links Z',

(see Fig. 4.) forming practically a continuat-ion of said rope L. The rope Lpasses downward and is secured to the engine-drum M', around which it is wound. m is a handlelever, which, through the rod mand suitableV This rope L3 passes from the pulley I2 over a pulley IS in the frame-work, and thence to a drum N', to which it is secured. This drum N is on the axle of a friction-drum N, of ordinary construction, controlled by a brake, the brake being tightened or loosened by means of a foot-lever'n, connected bythe rod n with suitable operating mechanism.

W is a weight hung from one end of the rope L, the other end of which i`s connected with the drum N', the weight WV being sufficient,when the friction-brake is loose, to carry the trolley D when the shovel is empty to the outer end of the boom C. in other words, is such that when the shovel is empty and the foot of the operator is olf the lever n the brake is loosened, and through the influence of the weight W, which turns the drum N and winds up the rope L3 thereon, the trolley D is carried outward on the boom C to the extreme position shown in Fig. 1 by the full lines. In this position the The construction, i

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, S S' in loading and unloading.

shovel is directly over the hatchway of the vessel or whatever receptacle contains the coal to be unloaded. Vhen once in this position, the trolley will remain there, even though the shovel be loaded with coal, by keeping the foot upon the lever n, thus tightening the brake n and preventing the turning of the drum N'.

The rope L' passes through asliding frame vK and is provided at its end with a stop Z,which is tapered and adapted to engage with a' correspondingly-tapered hole 7c in the front side of said frame. The rope L', as here shown, terminates in the eye-splice Z2, against which is held the stop Z in the manner 'shown in Fig. 4.', The rope L has also an eye-splice at its end, which is connected with the eyesplice Z2 by `one or more links Z'.

The frame K is adapted to slide in-anyvdesired manner over the guides B B. Each of the said guides is preferably provided with a metal track B', andthe base K' of the frame has feet or lugs Zo', which slide freely over them. The block K3 serves to keep the frame centered. The front plates K4 K5 are bolted or screwed to the side pieces of the frame, the hole 7c lying, preferably, halt` in each of' the said pieces K4L K5. At the back of the frame K are the rollers h5 7a4, between which the rope L' moves when the frame is stationary.

L5 is a rope or chain one end of which is connected to the sliding frame. This rope p passes over the sheave-pulley I', and, as shown in Fig. 1, the other end is -tastened to the portion lI4 of the two-speedv drum I4 I5. To the part I5, of larger diameter, is secured one end of the rope L2, the other end of which is connected to trolley D.

The shovel shown in the drawings is of the kind wherein the two halves S S may be opened apart to close together again in the coal or other material to be hoisted, thus gatheringa shovelfull of coal together therein. It may in like manner be opened apart when it is desired to dump thesame out of the'shovel. The particular form of bucket or shovel employed, however, is immaterial and forms no part of my invention. A simple bucket loaded by hand may be substituted,

for the shovel herein shown.

The rope L5 shown in the drawings is for the purpose of opening and closing the shovel This rope is connected at one end with suitable opening and closing mechanism in the shovel itself, thence passes over a pulley E in the trolley, then over a pulley in line with the pulley I,

and down back of the rope L to adrum (not shown) operated by the engine in such amanner that, when the rope L6 is pulled taut the shovel S S' is closed together and when slackened up the two parts S S' are opened apart.

The operator standswhere he can with his foot press upon the. levern and with his hand manipulate the engine-lever m.

Q is a chute into which the coal is to be dis- I charged.

In order to more clearly illustrate the operation of the apparatus, start with the shoveld or bucket S S' perfectly empty. The weight W is sufiicient in this case to keep the trolley at the outer end of the boom C. The shovel may be lowered and raised (as high as the po- ,bythe full lines in Fig. l, the stop Zentering the tapered opening Zr,v in the front of the frame K and the rope L' continuing to be wound upon the ldrum M', the said frame Kv will be pulled downward along the track B B, and by means of the ropes L5 and L2 the trolley D will be carried in over the boom C, and at the same time the shovel S S' will be raised, so as to bring the said shovel to a point over the delivery-chute Q, in the position indicated by dotted lines in Fig. l. Duringthe inward motion of'the trolley the foot of the operator is off the lever n. When the trolley and shovel are in the position indicated bythe dottedlines in Fig. l, the operator reverses the engine and lowers the bucket as far as he desires, keeping his foot pressed upon the lever n during this operation, which by tight-- ening the friction-brake prevents the weight Wr from acting to move the trolley outward during the unwinding of the rope L'from the drum M'. By the reverse of these operations the bucket is raised, the trolley carried Aoutward, and the bucket again lowered.

The speed with which the shovel is moved inward while being raised depends on the relative sizes of the two parts I4 I5 oi' the expanding-drum. As shown in Fig. 1, the drum I4 is two-thirds the Vsizeof the drum I5, in which case the speed of the shovel inward is to its speed upward as three is to two. By varying the relative sizes of the two drums I4 I5, the relative speeds of the shovel inward and upward may be varied. If it is desired to bring the shovel in at the same speed as it is raised, the expanding-drum I4 15 may be dispensed with altogether and in its place a vplain sheavepulley IG substituted, as shown in Fig. 2. In this case the rope L5 passes under this pulley and continues as far as the trolley l).

The operation of my apparatus, as just described, is applicable to a case wherein the bucket, when raisedor lowered, is empty or wherein the load contained in the shovel or bucket is very light. When the shovel or bucket is filled with a heavy load, as coal, and the trolley is at the outer end of the boom C, the weight of the shovel and the load be- IOO IIO

ing much greater than that of the weight W, I

said shovel is being raised. Starting in thisv case with the shovel empty, the trolley will,

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as before, be carried outward to the end of Vthe boom C. The foot of the operator is then pressed down on the presser-lever a, and the shovel is lowered and loaded up. The foot being still held down on the lever n, the shovel and the load are then raised by starting the engine and winding the rope L on the drum M to a point corresponding with that shown by the full lines in Fig. l. The 1foot being then raised from the presser-lever, the effect of the load exceeding the weight WV will be to move the trolleyD inward vfor some distance until the weight "W will exactly balance the weight of the shovel and the load. In this position, however, the shovel will not be in far enough to bring it over the chute. I therefore so arrange the parts that when the shovel and load have been carried inward as far as it willby the weight of the load the stop Z on the rope L will come in contact with the front of the sliding frame K, and, pulling down said frame, will draw the trolley in as far as necessary, in the manner already described. The foot is then placed on the lever n, the engine-drum reversed, and the shovel and load lowered to be dumped, if desired, or dumped without lowering.

If desired, the ropes L and L may be made in one piece and a stop or enlargement of any kind placed thereon to engage with the sliding frame. I prefer to have these ropes, as shown, in two pieces, with the stop Z at the end of one of them, the two being connected by one or more links, as shown, as this construction is more durable by reason of the fact that with'the stop made in the middle of a wire rope it is more apt to cause the breaking of the strands in passing over the sheave-pulley. The ropes L L, being connected together end to end, form virtually one continuous lifting and lowering rope.

I preferably so construct the sliding frame that the rope L may be removed therefrom without necessitating the removal of the sliding frame from the track and detaching the frame from the rope L5. To this end the front of the frame is made in two pieces K4 K5, as above described, and the pin on which the upper roller k3 revolves can easily be removed. It is therefore only necessary to detach the upper front plate K5 and the upper roller k3 to remove the rope L from the frame.

Though for convenience I show and describe a bucket or shovel as being operated by the apparatus to contain the load to be hoisted, I do not limit myself thereto, as in the hoisting of solid blocks and othersuch matter a simple hook may be substituted for the said shovel or bucket at the bottom of the lifting-rope, or the lifting and lowering rope may be passed directly around the load to behoisted. Obviously whatever is used at the bottom of the lifting-rope to hold the load is an equivalent of said shovel or bucket.

I claimi l. In a hoisting apparatus, a movable trolley, in combination with a counterbalanced loading and dumping bucket, flexible means.

ropes L L passing. through said trolley and suitably guided in the frame-work of the apparatus, a loading and dumping bucket s ecured to said rope L, a sliding frame K, movable over guideways, said frame being provided with an opening Zo, a stop Z, engaging with said opening, a two-speed drum I4 I5, and suitably-guided ropes L5 and L2, connecting said frame and trolley, respectively, with said drum, whereby the bucket is drawn inward while being raised, substantially as described.

3. In a hoisting apparatus, the combination of a movable trolley, a sliding frame K, movable over suitable guideways, said frame being provided with the opening 7c and ropeguiding pulleys 7c3 Z0, iexiblemeans for connecting said trolley and frame, and flexible means connected with the bucket for lifting and lowering the same, passing through both the trolley and the frame, and provided with a stop Z, engaging with the opening Zc,where by when the stop engages with the opening the frame is pulled downward and the trolley inward, substantially as described.

4. In a hoisting apparatus, the combination of a rope L, connected with the load, a movable trolley, a sliding trolley-operating frame K, provided with an opening Zo, suitablyguided flexible means for connecting said trolley and frame, 'a rope L', passing through said opening and provided with an eye-splice Z2, and a stop Z, held on said eye-splice Z2 and engaging with said opening, the ropes L and L being linked together, all arranged and operating substantially as and for the purposes described.

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In witness whereof I have hereunto set my Witnesses:

WM. B. H. DowsE, ALBERT E. LEACH. 

